A potentiometer wire carries a steady current. The potential diff. across 70cm length of it balances the potential diff. across a 2 ohm coil supplied by a cell of emf 2V and unknown int. resistance r, When 1 ohm resistance is placed in parallel with a 2 ohm, a length equal to 50 cm of the potentiometer wire is required to balance the potential diff. across the parallel combination. Find r.
Asked by | 23rd Sep, 2011, 01:44: PM
Expert Answer:
Answered by | 4th Oct, 2011, 10:14: PM
Related Videos
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change